CharArrayWriter

java.lang.Object
- java.io.Writer
- - java.io.CharArrayWriter

所有已实现的接口:

Closeable, Flushable, Appendable, AutoCloseable
```
public class CharArrayWriter
extends Writer
```
This class implements a character buffer that can be used as an Writer. The buffer automatically grows when data is written to the stream. The data can be retrieved using toCharArray() and toString().
Note: Invoking close() on this class has no effect, and methods of this class can be called after the stream has closed without generating an IOException.

从以下版本开始:

JDK1.1

字段概要

字段
限定符和类型字段说明

protected char[] buf
The buffer where data is stored.

protected int count
The number of chars in the buffer.
- 从类继承的字段 java.io.Writer
  lock

字段
限定符和类型	字段	说明
`protected char[]`	`buf`	The buffer where data is stored.
`protected int`	`count`	The number of chars in the buffer.

构造器概要

构造器
构造器说明

CharArrayWriter()
Creates a new CharArrayWriter.

CharArrayWriter(int initialSize)
Creates a new CharArrayWriter with the specified initial size.

构造器
构造器	说明
`CharArrayWriter()`	Creates a new CharArrayWriter.
`CharArrayWriter(int initialSize)`	Creates a new CharArrayWriter with the specified initial size.

方法概要

所有方法实例方法具体方法
限定符和类型	方法	说明
`CharArrayWriter`	`append(char c)`	Appends the specified character to this writer.
`CharArrayWriter`	`append(CharSequence csq)`	Appends the specified character sequence to this writer.
`CharArrayWriter`	`append(CharSequence csq, int start, int end)`	Appends a subsequence of the specified character sequence to this writer.
`void`	`close()`	Close the stream.
`void`	`flush()`	Flush the stream.
`void`	`reset()`	Resets the buffer so that you can use it again without throwing away the already allocated buffer.
`int`	`size()`	Returns the current size of the buffer.
`char[]`	`toCharArray()`	Returns a copy of the input data.
`String`	`toString()`	Converts input data to a string.
`void`	`write(char[] c, int off, int len)`	Writes characters to the buffer.
`void`	`write(int c)`	Writes a character to the buffer.
`void`	`write(String str, int off, int len)`	Write a portion of a string to the buffer.
`void`	`writeTo(Writer out)`	Writes the contents of the buffer to another character stream.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

从类继承的方法 java.io.Writer
write, write

- 字段详细资料
  - buf
```
protected char[] buf
```
    The buffer where data is stored.
  - count
```
protected int count
```
    The number of chars in the buffer.
- 构造器详细资料
  - CharArrayWriter
```
public CharArrayWriter()
```
    Creates a new CharArrayWriter.
  - CharArrayWriter
```
public CharArrayWriter(int initialSize)
```
    Creates a new CharArrayWriter with the specified initial size.
    
    参数:
    
    initialSize - an int specifying the initial buffer size.
    
    抛出:
    
    IllegalArgumentException - if initialSize is negative
- 方法详细资料
  - write
```
public void write(int c)
```
    Writes a character to the buffer.
    
    覆盖:
    
    write 在类中 Writer
    
    参数:
    
    c - int specifying a character to be written
  - write
```
public void write(char[] c,
                  int off,
                  int len)
```
    Writes characters to the buffer.
    
    指定者:
    
    write 在类中 Writer
    
    参数:
    
    c - the data to be written
    
    off - the start offset in the data
    
    len - the number of chars that are written
  - write
```
public void write(String str,
                  int off,
                  int len)
```
    Write a portion of a string to the buffer.
    
    覆盖:
    
    write 在类中 Writer
    
    参数:
    
    str - String to be written from
    
    off - Offset from which to start reading characters
    
    len - Number of characters to be written
  - writeTo
```
public void writeTo(Writer out)
             throws IOException
```
    Writes the contents of the buffer to another character stream.
    
    参数:
    
    out - the output stream to write to
    
    抛出:
    
    IOException - If an I/O error occurs.
  - append
```
public CharArrayWriter append(CharSequence csq)
```
    Appends the specified character sequence to this writer.
    An invocation of this method of the form out.append(csq) behaves in exactly the same way as the invocation
```
     out.write(csq.toString()) 
```
    Depending on the specification of toString for the character sequence csq, the entire sequence may not be appended. For instance, invoking the toString method of a character buffer will return a subsequence whose content depends upon the buffer's position and limit.
    指定者:
    
    append 在接口中 Appendable
    
    覆盖:
    
    append 在类中 Writer
    
    参数:
    
    csq - The character sequence to append. If csq is null, then the four characters "null" are appended to this writer.
    
    返回:
    
    This writer
    
    从以下版本开始:
    
    1.5
  - append
```
public CharArrayWriter append(CharSequence csq,
                              int start,
                              int end)
```
    Appends a subsequence of the specified character sequence to this writer.
    An invocation of this method of the form out.append(csq, start, end) when csq is not null, behaves in exactly the same way as the invocation
```
     out.write(csq.subSequence(start, end).toString()) 
```
    指定者:
    
    append 在接口中 Appendable
    
    覆盖:
    
    append 在类中 Writer
    
    参数:
    
    csq - The character sequence from which a subsequence will be appended. If csq is null, then characters will be appended as if csq contained the four characters "null".
    
    start - The index of the first character in the subsequence
    
    end - The index of the character following the last character in the subsequence
    
    返回:
    
    This writer
    
    抛出:
    
    IndexOutOfBoundsException - If start or end are negative, start is greater than end, or end is greater than csq.length()
    
    从以下版本开始:
    
    1.5
  - append
```
public CharArrayWriter append(char c)
```
    Appends the specified character to this writer.
    An invocation of this method of the form out.append(c) behaves in exactly the same way as the invocation
```
     out.write(c) 
```
    指定者:
    
    append 在接口中 Appendable
    
    覆盖:
    
    append 在类中 Writer
    
    参数:
    
    c - The 16-bit character to append
    
    返回:
    
    This writer
    
    从以下版本开始:
    
    1.5
  - reset
```
public void reset()
```
    Resets the buffer so that you can use it again without throwing away the already allocated buffer.
  - toCharArray
```
public char[] toCharArray()
```
    Returns a copy of the input data.
    
    返回:
    
    an array of chars copied from the input data.
  - size
```
public int size()
```
    Returns the current size of the buffer.
    
    返回:
    
    an int representing the current size of the buffer.
  - toString
```
public String toString()
```
    Converts input data to a string.
    
    覆盖:
    
    toString 在类中 Object
    
    返回:
    
    the string.
  - flush
```
public void flush()
```
    Flush the stream.
    
    指定者:
    
    flush 在接口中 Flushable
    
    指定者:
    
    flush 在类中 Writer
  - close
```
public void close()
```
    Close the stream. This method does not release the buffer, since its contents might still be required. Note: Invoking this method in this class will have no effect.
    
    指定者:
    
    close 在接口中 AutoCloseable
    
    指定者:
    
    close 在接口中 Closeable
    
    指定者:
    
    close 在类中 Writer

类 CharArrayWriter

字段概要

从类继承的字段 java.io.Writer

构造器概要

方法概要

从类继承的方法 java.lang.Object

从类继承的方法 java.io.Writer

字段详细资料

buf

count

构造器详细资料

CharArrayWriter

CharArrayWriter

方法详细资料

write

write

write

writeTo

append

append

append

reset

toCharArray

size

toString

flush

close